Aerosol delivery system

ABSTRACT

An aerosol delivery system including a first engagement mechanism, a first power supply, and a first vaporizer, wherein the first vaporizer is arranged to selectively receive power from the first power supply to generate a first aerosol from a first aerosol precursor material for user inhalation; and a second aerosol delivery device including a second engagement mechanism, a second power supply, and a second vaporizer, wherein the second vaporizer is arranged to selectively receive power from the second power supply to generate a second aerosol from a second aerosol precursor material for user inhalation; wherein the first engagement mechanism of the first aerosol delivery device and the second engagement mechanism of the second aerosol delivery device are arranged to releasably co-engage with one another to selectively couple the first aerosol delivery device to the second aerosol delivery device so the first aerosol delivery device and the second aerosol delivery device may be used together to deliver the first and second aerosols to a single user when they are coupled together and may be used independently to deliver the first and second aerosols to different users when they are not coupled together.

PRIORITY CLAIM

The present application is a National Phase entry of PCT Application No.PCT/GB2018/050706, filed Mar. 19, 2018, which claims priority from GBPatent Application No. 1704999.0, filed Mar. 29, 2017, which is herebyfully incorporated herein by reference.

FIELD

The present disclosure relates to aerosol delivery systems such aselectronic nicotine delivery systems (e.g. electronic cigarettes and thelike).

BACKGROUND

Aerosol delivery systems such as electronic cigarettes (e-cigarettes)generally contain an aerosol precursor material or aerosol source, suchas a reservoir of a source liquid containing a formulation, typicallyincluding nicotine and often flavorants, or a solid material such as atobacco-based product, from which an aerosol is generated for inhalationby a user, for example through atomization/heat vaporization. Thus, anaerosol delivery system will typically comprise an aerosol generationchamber containing an atomizer or vaporizer, e.g. a heating element,arranged to atomize (or vaporize) a portion of precursor material togenerate an aerosol in the aerosol generation chamber. As a user inhaleson the device through a mouthpiece and electrical power is supplied tothe atomizer, air is drawn into the device through inlet holes and intothe aerosol generation chamber where the air mixes with the atomizedprecursor material to form an aerosol. There is a flow path connectingbetween the aerosol generation chamber and an opening in the mouthpieceso the incoming air drawn through the aerosol generation chambercontinues along the flow path to the mouthpiece opening, carrying someof the aerosol with it, and out through the mouthpiece opening forinhalation by the user.

Aerosol delivery systems may comprise a modular assembly including bothreusable and replaceable cartridge parts. Typically a cartridge partwill comprise the consumable aerosol precursor material and theatomizer, while a reusable device part will comprise longer-life items,such as a rechargeable battery, device control circuitry, activationsensors and user interface features. The reusable part may also bereferred to as a control unit or battery section and replaceablecartridge parts may also be referred to as cartomizers.

Cartomizers are electrically and mechanically coupled to a control unitfor use, for example using a screw thread or bayonet fixing withappropriately engaging electrical contacts. When the aerosol precursormaterial in a cartomizer is exhausted, or the user wishes to switch to adifferent cartomizer having a different aerosol precursor material, acartomizer may be removed from the control unit and a replacementcartomizer attached in its place.

Switching between cartomizers can be inconvenient for a user, especiallyif a user is repeatedly switching between two or more flavors on aregular basis as this requires disassembly and reassembly of theelectronic cigarette by splitting the aerosol delivery device into itsmodular components to switch flavor. Electronic cigarettes have beenthus been proposed with different precursor/source material arranged ina single device to provide different aerosols (e.g., having differentflavors) to a user inhaling on the mouthpiece, either automatically orin response to user selection. The sources of material to be vaporizedare typically located within the electronic cigarette and so stillrequires disassembly and reassembly of the electronic cigarette if theuser wishes to switch to using a further source material or to lend oneof the sources of material to another user.

Various approaches are described herein which seek to help address someof these issues.

SUMMARY

According to a first aspect of certain embodiments there is provided anaerosol delivery system including a first aerosol delivery devicecomprising a first engagement mechanism, a first power supply, and afirst vaporizer, wherein the first vaporizer is arranged to selectivelyreceive power from the first power supply to generate a first aerosolfrom a first aerosol precursor material for user inhalation; and asecond aerosol delivery device comprising a second engagement mechanism,a second power supply, and a second vaporizer, wherein the secondvaporizer is arranged to selectively receive power from the second powersupply to generate a second aerosol from a second aerosol precursormaterial for user inhalation; wherein the first engagement mechanism ofthe first aerosol delivery device and the second engagement mechanism ofthe second aerosol delivery device are arranged to releasably co-engagewith one another to selectively couple the first aerosol delivery deviceto the second aerosol delivery device so the first aerosol deliverydevice and the second aerosol delivery device may be used together todeliver the first and second aerosols to a single user when they arecoupled together and may be used independently to deliver the first andsecond aerosols to different users when they are not coupled together.

According to a second aspect of certain embodiments there is provided anaerosol delivery device comprising: a power supply; a vaporizer arrangedto selectively receive power from the power supply to generate anaerosol from an aerosol precursor material for user inhalation; and anengagement mechanism for releasably co-engaging the aerosol deliverydevice with a further aerosol delivery device arranged to generate afurther aerosol for user inhalation so the aerosol delivery device andthe further aerosol delivery device may be used together to deliveraerosol to a single user when they are coupled together and the aerosoldelivery device may be used independently of the other aerosol deliverydevice when the aerosol delivery device is not coupled to the otheraerosol delivery device.

According to a third aspect of certain embodiments there is provided anaerosol delivery system including first aerosol delivery meanscomprising first engagement means, first power supply means, and firstvaporizing means, wherein the first vaporizing means is arranged toselectively receive power from the first power supply means to generatea first aerosol from a first aerosol precursor material for userinhalation; and second aerosol delivery means comprising secondengagement means, second power supply means, and second vaporizingmeans, wherein the second vaporizing means is arranged to selectivelyreceive power from the second power supply means to generate a secondaerosol from a second aerosol precursor material for user inhalation;wherein the first engagement means of the first aerosol delivery meansand the second engagement means of the second aerosol delivery means arearranged to releasably co-engage with one another to selectively couplethe first aerosol delivery means to the second aerosol delivery means sothe first aerosol delivery means and the second aerosol delivery meansmay be used together to deliver the first and second aerosols to asingle user when they are coupled together and may be used independentlyto deliver the first and second aerosols to different users when theyare not coupled together.

It will be appreciated that features and aspects of the disclosuredescribed above in relation to the first and other aspects of thedisclosure are equally applicable to, and may be combined with,embodiments of the invention according to other aspects of thedisclosure as appropriate, and not just in the specific combinationsdescribed above.

BRIEF DESCRIPTION OF THE DRAWINGS

Embodiments of the disclosure will now be described, by way of exampleonly, with reference to the accompanying drawings, in which:

FIG. 1 schematically represents an aerosol delivery device having anuncoupled cartomizer and control unit in cross-section along alongitudinal axis thereof for use in an aerosol delivery system inaccordance with an embodiment of the disclosure.

FIG. 2 schematically represents the control unit of FIG. 1 incross-section along a longitudinal axis thereof.

FIG. 3 schematically represents the cartomizer of FIG. 1 incross-section along a longitudinal axis thereof.

FIG. 4 schematically represents the aerosol delivery device of FIG. 1 inperspective view showing the outer surfaces thereof.

FIG. 5A schematically represents an aerosol delivery system comprisingthe aerosol delivery device of FIG. 1 and a second aerosol deliverydevice, both shown in cross-section along respective longitudinal axesthereof in an uncoupled state.[

FIG. 5B schematically represents the aerosol delivery system of FIG. 5Ain a releasably magnetically coupled state.

FIG. 5C schematically shows the aerosol delivery system of FIG. 5B asviewed along a longitudinal axis in a direction towards themouthpieces/mouthpiece ends of the releasably magnetically coupledaerosol delivery devices.

FIG. 6A shows an aerosol delivery system comprising two aerosol deliverydevices in an uncoupled state in accordance with a second embodiment ofthe disclosure, each aerosol delivery device having an interlockingsection configured to mechanically engage with a respective interlockingsection.

FIG. 6B shows the aerosol delivery system of FIG. 6A in a releasablymechanically coupled state.

DETAILED DESCRIPTION

Aspects and features of certain examples and embodiments arediscussed/described herein. Some aspects and features of certainexamples and embodiments may be implemented conventionally and these arenot discussed/described in detail in the interests of brevity. It willthus be appreciated that aspects and features of apparatus and methodsdiscussed herein which are not described in detail may be implemented inaccordance with any conventional techniques for implementing suchaspects and features.

The present disclosure relates to aerosol delivery systems, which mayalso be referred to as aerosol provision systems, such as e-cigarettes.Throughout the following description the term “e-cigarette” or“electronic cigarette” may sometimes be used; however, it will beappreciated this term may be used interchangeably with aerosol deliverysystem and electronic aerosol delivery system. Furthermore, and as iscommon in the technical field, the terms “vapor” and “aerosol”, andrelated terms such as “vaporize” and “aerosolize”, may also be usedinterchangeably.

The present disclosure provides an aerosol delivery system whichincludes at least two aerosol delivery devices. Each aerosol deliverydevice is provided with components required to generate aerosol from arespective aerosol precursor material that can be located within theaerosol delivery devices and to subsequently deliver aerosol generatedfrom this precursor material to a user. The present disclosure providesa system whereby aerosol delivery devices comprise respective engagementmechanisms that can be co-engaged with one another to selectively coupletogether the aerosol delivery devices such that, during use, the firstand second aerosol delivery devices can deliver the first and secondaerosols to a single user. For instance, the user can inhale onmouthpiece openings of both aerosol delivery devices simultaneously toreceive a mixture of the aerosols separately generated by the coupledaerosol delivery devices. The engagement mechanism may be mechanical ormagnetic in nature and provides a sufficiently strong coupling toprevent separation of the aerosol delivery devices during normal use(i.e., when inhaling on the mouthpiece openings simultaneously) butenables the aerosol delivery devices to be separated under (deliberate)application of a separation force to the aerosol delivery devices. In anuncoupled state, each aerosol delivery device is configured to generateaerosol independently of the other aerosol delivery device—that is, eachaerosol delivery device is capable of independent use. In this way,switching of the aerosol delivery devices, e.g., to provide a differentflavor or aerosol precursor material combinations, can be performedintuitively and easily without disassembling individual aerosol deliverydevices.

FIG. 1 is a schematic diagram of an aerosol delivery device 10 inaccordance with some embodiments of the present disclosure. The aerosoldelivery device 10 has a generally cuboidal shape (see also FIG. 4),extending along a longitudinal axis indicated by dashed line LA, andcomprises two main components, namely a control unit 20 and a cartomizer30.

The cartomizer 30 includes an internal chamber containing a reservoir ofliquid formulation including nicotine (or more generally a precursormaterial), a heater (or more generally a vaporizer/atomizer), and amouthpiece end 35. The cartomizer 30 may further include a wick orsimilar facility to transport a small amount of the liquid formulationfrom the reservoir to the heater. The control unit 20 includes are-chargeable battery as a power supply/source to provide power to theaerosol delivery device 10 and a circuit board for generally controllingthe aerosol delivery device 10. When the heater receives power from thebattery, as controlled by the circuit board, the heater atomizes (heats)the nicotine and this aerosol (vapor) is then inhaled by a user throughthe mouthpiece end 35, specifically through one or more openings 352therein (see FIGS. 3 and 4).

The control unit 20 and cartomizer 30 are detachable from one another byseparating in a direction parallel to the longitudinal axis LA, as shownin FIG. 1, but are joined together when the device 10 is in use by aconnection, indicated schematically in FIG. 1 as 25A and 25B, to providemechanical and electrical connectivity between the control unit 20 andthe cartomizer 30. The electrical connector on the control unit 20 thatis used to connect to the cartomizer 30 may also serve as a socket forconnecting a charging device (not shown) when the control unit 20 isdetached from the cartomizer 30, or alternatively, the control unit 20may be provided with a dedicated charging port (such as a USB port) atone end thereof, e.g., the end opposite the end configured to couple tothe cartomizer 30. The cartomizer 30 may be detached from the controlunit 20 and disposed of when the supply of nicotine is exhausted (andreplaced with another cartomizer if so desired).

FIG. 1 schematically indicates various surfaces of the cartomizer 30 andcontrol unit 20. Specifically, the control unit 20 has an upper/topsurface 222 and a lower/bottom surface 224. The lower surface 224 is thesurface of the control unit 20 directly opposite the upper surface 222.Equally, the cartomizer 30 has an upper surface 322 and a lower surface324. The lower surface 324 is the surface of the cartomizer 30 directlyopposite the upper surface 322. It will be appreciated that thisterminology, i.e., upper/lower or equivalent, is used purely forconvenience of explanation and is not intended to suggest a particularorientation of the aerosol delivery device 10 should be adopted innormal use. In some cases, and as will become apparent later, theaerosol delivery device 10 may be rotated about the longitudinal axis LAsuch that the upper surfaces 222 and 322 face downwards, i.e., theorientation of the surfaces as seen in FIG. 1 is reversed.

FIG. 1 (and also FIG. 3 described later) represents the mouthpiece end35 of the cartomizer 30 as a separate box. It should be understood thatthis representation is not meant to signify that the mouthpiece end 35is a separate piece/component of the cartomizer 30, but rather a regionof the cartomizer 30 which engages with the user's lips when the userdesires to inhale aerosol generated by the device 10 with the mouthpieceend 35 of the cartomizer 30 being modified in some way to allow aerosolto pass from inside the cartomizer 30 to outside, e.g., by one or moreopenings 352. Equally, it should be understood that in alternativeimplementations the mouthpiece end 35 is provided as a separatecomponent that is attachable to and detectable from the main body of thecartomizer 30. In these alternative implementations, the main body ofthe cartomizer (which contains the reservoir for storing the aerosolprecursor) can be replaced or switched with another main body, e.g.,when the reservoir is empty or to change flavors of the aerosolgenerated. Retaining the mouthpiece end 35 may be advantageous whenswitching aerosol delivery devices between different users for reasonsof hygiene.

As also seen in FIG. 1, the control unit 20 in this implementationcomprises two magnetic portions 226 spaced from each other along thelongitudinal axis LA. The magnetic portions 226 form a first engagementmechanism arranged to co-engage with a second engagement mechanism of asecond aerosol delivery to selectively magnetically couple the aerosoldelivery device 10 to the second aerosol delivery device. The magneticportions 226 can have the magnetic poles aligned in any desiredorientation. That is, the magnetic portions can be arranged to eitherhave the magnetic poles in an upper/lower arrangement (e.g., south polefacing toward the upper surface 222 and north pole facing toward thelower surface 224) or in a left/right arrangement (e.g., south polefacing toward the connection 25B and north pole facing toward theopposite end of the control unit 20). The magnetic coupling will bedescribed in more detail below.

Between the magnetic portions 226 are provided two electrical contacts228 which are configured to provide positive and negative electricalterminals respectively. The electrical contacts 228 are connected to acontroller within the control unit 20 and the power source. In essence,the electrical contacts 228 enable power and/or control signals to bepassed to/from the power source or controller respectively from/to asecond aerosol delivery device magnetically coupled to the aerosoldelivery device 10 by the magnetic portions 226. That is, the powerand/or control signals can be passed between coupled aerosol deliverydevices using the electrical coupling. The electrical coupling will bedescribed in more detail below.

It should be appreciated that the magnetic portions 226 and electricalcontacts 228 are not shown to scale in FIG. 1. In FIG. 1, these portions226 and contacts 228 are schematically represented as protruding intothe body of the control unit 20 and being flush with the lower surface224 thereof. However, the magnetic portions 226 and electrical contacts228 in other embodiments can be constructed as strips appliedto/provided on the surface 224 of the body of the control unit 20 andprotrude by an amount equal to the thickness of the strip from thesurface 224.

FIGS. 2 and 3 provide schematic diagrams of the control unit 20 andcartomizer 30 respectively of the aerosol delivery device of FIG. 1.Note that various components and details, e.g. such as wiring and morecomplex shaping, have been omitted from FIGS. 2 and 3 for reasons ofclarity in addition to the magnetic portions 226 and electrical contacts228.

As shown in FIG. 2, the control unit 20 includes, as the power source, are-chargeable battery or cell 210 for powering the aerosol deliverydevice 10, as well as a chip, such as a (micro)controller forcontrolling the aerosol delivery device 10. The controller is attachedto a small printed circuit board (PCB) 215 that also includes a sensorunit. If a user inhales on the mouthpiece end 35, air is drawn into theaerosol delivery device 10 through one or more air inlet holes (notshown in FIGS. 1 and 2). The sensor unit detects this airflow, and inresponse to such a detection, the controller provides power from thebattery 210 to the heater 155 in the cartomizer 30.

As shown in FIG. 3, the cartomizer 30 includes an air passage 161extending along the central (longitudinal) axis of the cartomizer 30from the mouthpiece end 35 to the connector 25A for joining thecartomizer to the control unit 20. A reservoir 160 ofnicotine-containing liquid is provided around the air passage 161. Thisreservoir 160 may be implemented, for example, by providing cotton orfoam soaked in the liquid. The cartomizer also includes a heater 155 inthe form of a coil of wire for heating liquid from reservoir 160 togenerate aerosol to flow through air passage 161 and out throughmouthpiece end 35. The mouthpiece end 35 is provided with two openings352 fluidly connected to the air passage 161 through which aerosol canbe passed to the user's lungs. The heater is powered through lines 166and 167, which are in turn connected to opposing polarities (positiveand negative, or vice versa) of the battery 210 via connector 25A (thedetails of the wiring between the power lines 166 and 167 and connector25A are omitted from FIG. 3).

One end of the control unit 20 provides a connector 25B for joining thecontrol unit 20 to the connector 25A of the cartomizer 30. Theconnectors 25A and 25B provide mechanical and electrical connectivitybetween the control unit 20 and the cartomizer 30. The connector 25Bincludes two electrical terminals, an outer electrode 240 and an innerelectrode 250, which are separated by insulator 260. The connector 25Alikewise includes an inner electrode 175 and an outer electrode 171,separated by insulator 172. The insulator 172 is surrounded by the outerelectrode 171. The outer electrodes 171 and 240 and inner electrodes 175and 250 are formed from an electrically conductive material, such asmetal, or are coated/plated with a conductive material (e.g.,silver-plated) while the insulators 171 and 260 are formed from anon-conductive material, such as plastic, rubber, silicone, or any othersuitable material. When the cartomizer 30 is connected to the controlunit 20, the inner electrode 175 and the outer electrode 171 of thecartomizer 30 engage the inner electrode 250 and the outer electrode 240respectively of the control unit 20. The inner electrode 250 is mountedon a coil spring 255 so that the inner electrode 175 pushes against theinner electrode 250 to compress the coil spring 255, thereby helping toensure good electrical contact when the cartomizer 30 is connected tothe control unit 20.

The cartomizer connector 25A is provided with two lugs or tabs 180A,180B, which extend in opposite directions away from the longitudinalaxis of the cartomizer 30. These tabs 180A, 180B are used to provide amechanical connection between the cartomizer 30 and the control unit 20.The tabs 180A, 180B in this implementation flexibly engage withcorresponding recesses (not shown) in the control unit 20 to provide asnap-fit type engagement to couple the cartomizer 30 to the control unit20 when the cartomizer 30 is forced toward the control unit 20 along thelongitudinal axis LA. In this regard, the tabs 180A, 180B arecompressible in a direction towards the longitudinal axis LA to enablethe cartomizer 30 to be inserted into the control unit 20 and are shapedso as to resist separation of the cartomizer 30 and control unit 20 whenthe tabs 180A, 180B are engaged with the corresponding recesses. Thesnap-fit engagement provides a secure and robust connection between thecartomizer 30 and the control unit 20 so that the cartomizer 30 andcontrol unit 20 are held in a fixed position relative to one another,without wobble or flexing, and the likelihood of any accidentaldisconnection is very small. Other snap-fit engagement mechanisms may beprovided that are constructed in an alternative manner to that describedabove. Moreover, it will be appreciated that other embodiments may use adifferent form of connection between the control unit 20 and thecartomizer 30, such as a bayonet or a screw connection.

As mentioned above, the cartomizer 30 is generally disposed of once theliquid reservoir 160 has been depleted, and a new cartomizer ispurchased and installed. Alternatively, the cartomizer 30 may berefilled with a new liquid and replaced. In either case the cartomizer30 is generally removed from the control unit 20.

FIG. 4 is a schematic perspective view of the aerosol delivery device 10of FIGS. 1 to 3 when the cartomizer 30 and control unit 20 are coupledtogether. In this implementation, the aerosol delivery device 10 isgenerally cuboidal and has a generally trapezoidal cross-section whenviewed in a plane perpendicular to the longitudinal axis LA, wherein thelongest side of the trapezium is curved between the two non-parallelsides of the trapezium. The separation distance between the twonon-parallel sides is referred to herein as the width W of the aerosoldelivery device 10 and increases in a direction from the lower surface324 to the upper surface 322. The terms longest side and shortest siderefer to the relative length of the sides taken in the width direction.FIG. 4 also shows the height H of the device which is the maximumseparation distance between the longest, curved side and the shortestside, in addition to the length L, which is the total length of theaerosol delivery device 10 (i.e., cartomizer 30 and control unit 20combined). The length direction is parallel to the longitudinal axis LA.

Accordingly, the upper surfaces 222 and 322 are curved in a widthdirection along the length of the aerosol delivery device 10. Thecartomizer 30 and control unit 20 have the same cross-section along thelongitudinal axis LA so that the respective upper and lower surfaces222, 322; 224, 324 are contiguous with one another when the cartomizer30 and control unit 20 are coupled together. The curved upper surfaces222 and 322 provide a device that some users may find easier togrip/hold.

FIG. 4 also shows the two mouthpiece openings 352 at the mouthpiece endof the cartomizer 30. These openings 352 communicate with air flowchannels provided throughout the aerosol delivery device 10 to allow airto be inhaled from outside the aerosol delivery device 10, through thedevice 10 to mix with the vaporized aerosol precursor material, and outthrough the openings 352 of the mouthpiece end 35 into the user's lungs.The openings 352 are provided in a crescent-shape wherein the upperopening is longer in length than the lower opening. It should beappreciated that this is one exemplary way of arranging the openings 352and other arrangements of openings may be provided, such as a number ofcircular holes disposed in a predefined pattern or a single opening. Insome implementations, the openings are arranged to provide a certaindirectionality to the air exiting the device. For example, the openingsmay be configured to direct air along a direction inclined with respectto the longitudinal axis.

FIGS. 5A and 5B schematically show an aerosol delivery system 100 inaccordance with some embodiments of the present disclosure. FIG. 5Aschematically shows the aerosol delivery system 100 in anuncoupled/decoupled state while FIG. 5B schematically shows the aerosoldelivery system 100 in a coupled state.

Referring to FIG. 5A first, the aerosol delivery system 100 of thepresent disclosure includes a plurality of aerosol delivery devices inan uncoupled state and shown having a separation distance between thedelivery devices. The principles of this disclosure will be describedherein with reference to two aerosol delivery devices but it should beappreciated the principles can equally be applied to an aerosol deliverysystem comprising more than two aerosol delivery devices.

FIG. 5A shows a first aerosol delivery device 10 which is the aerosoldelivery device 10 of FIGS. 1 to 4. The cartomizer 30 and control unit20 are coupled together by the connectors 25A and 25B and are providedin a state ready to generate and deliver aerosol to a user. In thisstate, a user can inhale on mouthpiece end 35 and receive aerosolgenerated by the aerosol delivery device 10 as described above.

In addition, FIG. 5A shows a second aerosol delivery device 10′. Thesecond aerosol delivery device 10′, in this implementation, includessimilar components to the first aerosol delivery device 10. Componentsof the second aerosol delivery device 10′ will be distinguished fromthose of the first aerosol delivery device 10 by use of a prime (′).Accordingly, for reasons of brevity, components having like referencesigns but differing only by the presence of a prime have the samefunction and construction as the un-primed component previouslydescribed, unless described to the contrary. Therefore, the secondaerosol delivery device 10′ comprises a second cartomizer 30′ includinga second mouthpiece end 35′ and a second control unit 20′. The secondcartomizer 30′ and second control unit 20′ are coupled together byconnections 25A′ and 25B′ and are provided in a state ready to generateand deliver aerosol to a user. In this state, a user can inhale on thesecond mouthpiece end 35′ and receive aerosol generated by the secondaerosol delivery device 10′ as described in a similar manner withrespect to the first aerosol delivery device 10.

The second cartomizer 30′ may, optionally, differ from the cartomizer 30by comprising a different source liquid in its reservoir 160′ having,for example, a different flavor or a different strength/concentration ofnicotine. Otherwise, in this implementation, the second cartomizer 30′is identical to the cartomizer 30.

The second control unit 20′ differs in construction from the controlunit 20 by the second engagement mechanism; specifically, in theorientation/alignment of the magnetic portions 226′. In thisimplementation, the magnetic portions 226′ are arranged to have thepolarity of each magnetic portion 226′ reversed compared to the polarityof magnetic portions 226 of the first aerosol delivery device 10 toallow for a magnetic coupling between magnetic portions 226 of the firstaerosol delivery device 10 and magnetic portions 226′ of the secondaerosol delivery device 10′. FIG. 5A shows two double-headed arrowsindicative of the magnetic forces acting between the magnetic portions226 and 226′ of the respective aerosol delivery devices 10, 10′. Asshould readily be understood by one skilled in the art, when themagnetic poles of the magnetic portions 226′ of the second aerosoldelivery device 10′ are reversed with respect to the correspondingmagnetic portions 226 of the first aerosol delivery device 10, anattractive magnetic force is generated causing the magnetic portions 226and 226′ to be attracted to one another.

Accordingly, when the magnetic force is sufficiently strong, the aerosoldelivery devices 10, 10′ are forced towards one another by theattractive magnetic force and couple together. FIG. 5B shows the firstand second aerosol delivery devices 10, 10′ in a magnetically coupledstate. In this state, the mouthpiece ends 35 and 35′ of each aerosoldelivery device 10, 10′ are provided adjacent one another. In thisregard, the magnetic force of coupling should be strong enough to notcause sliding/twisting/slipping of one aerosol delivery device relativeto another during normal use (i.e., when inhaling on the devices), butshould be sufficiently weak to enable a user to separate the devices 10,10′ by applying a force, or component thereof, in the direction in whichthe force of magnetic attraction acts. Hence, when coupled, a user canmanipulate the two devices 10, 10′ as though they were handling a singledevice without the devices 10, 10′ becoming separated.

When coupled, the longitudinal axes LA, LA′ of the respective aerosoldelivery devices 10, 10′ are substantially parallel as can be seen inFIG. 5B. Equally, because of the positioning of the magnetic portions226 and 226′, the aerosol delivery devices 10, 10′ are provided suchthat the lengths thereof overlap/align. In other words, the overalllength of the aerosol delivery system 100 from an edge of the first orsecond aerosol delivery device 10, 10′ furthest in one direction alongthe longitudinal axis to an opposite edge furthest in the oppositedirection along the longitudinal axis is approximately the same as thelength of an individual aerosol delivery device 10, 10′, barring anyminor misalignments.

FIG. 5C schematically represents the aerosol delivery system 100 in acoupled state (i.e., of FIG. 5B) when viewed along the longitudinal axisLA in a direction towards the mouthpiece ends 35, 35′ as shown by line5C in FIG. 5B. As can be seen, the lower surfaces 224, 324 and 224′,324′ of each aerosol delivery device 10, 10′ abut in the coupled state(and hence, relatively speaking, the lower surfaces 224′ and 324′ areactually the uppermost surfaces of the second aerosol delivery device10′). In a coupled state, a user places their lips on the upper surface322 of the first aerosol delivery device 10 (specifically an upper lip)and on the upper surface 322′ of the second aerosol delivery device 10′(specifically a lower lip) to engage with the adjacent mouthpiece ends35 and 35′ simultaneously. In this way, when a user inhales on theaerosol delivery system 100 in a coupled state, a mixture of air isinhaled including air that passes through the first aerosol deliverydevice 10 (and which may include aerosol generated by the first aerosoldelivery device) and air that passes through the second aerosol deliverydevice 10′ (and which may include aerosol generated by the secondaerosol delivery device). Air (which may include the generated aerosol)exits the respective aerosol delivery devices via the openings 352 and352′ as shown in FIG. 5C. Thus, a user can inhale a mixture of aerosolgenerated by both aerosol delivery devices 10, 10′.

The total height of the aerosol delivery system 100 is equal to twicethe height H of the individual aerosol delivery devices 10, 10′ asindicated in FIG. 5C. Therefore, the height H for each individual device10, 10′ should be chosen to provide a comfortable total height in thecoupled state for a user to engage with both mouthpiece ends. By way ofexample only, the total height may be on the order of 15 mm meaning thateach individual aerosol delivery device has a height H of 7.5 mm. Thisensures the user is able to engage with both mouthpieces 35, 35′ in acoupled state and each mouthpiece end separately in an uncoupled state.

It should be understood that in the coupled state each of the aerosoldelivery devices 10, 10′ can be operated to generate aerosol from therespective source liquids contained therein. The single user can thusinhale a mixture of both aerosols when the two devices areco-engaged/coupled. To change the respective aerosol combination (i.e.,flavors/strengths) a user disconnects/decouples the first and secondaerosol delivery devices 10, 10′ and exchanges the second aerosoldelivery device 10′ for a third aerosol delivery device (not shown)having a different source liquid contained therein. Such changing ofaerosol combinations does not require any significant disassembly of theindividual aerosol delivery devices 10, 10′. Instead, the user canintuitively and easily swap aerosol sources by changing entire aerosoldelivery devices without disconnecting individual cartomizers of therespective aerosol delivery devices.

Additionally, when the first and second aerosol delivery devices 10, 10′are magnetically coupled, the electrical contacts 228 and 228′ of eachaerosol delivery device 10, 10′ are brought into contact to electricallycouple/connect the control unit 20 with the control unit 20′. In asimilar way to the magnetic portions 226 and 226′, the control unit 20may differ in construction from the control unit 20 in that thepolarities of the electrical contacts 228′ of the second aerosoldelivery device 10′ are reversed with respect to the polaritiescorresponding electrical contacts 228 on the first aerosol deliverydevice 10. This enables an appropriate electrical connection when thefirst and second aerosol delivery devices 10, 10′ are magneticallycoupled together. As described above, the electrical connection enablespower and/or control signals to be passed between the first and secondaerosol delivery devices 10, 10′.

The control signals are electrical signals that are received at eitherof the controllers located in the aerosol delivery devices and are usedto determine how the respective aerosol delivery devices 10, 10′ shouldoperate.

Control signals include, for example, an indication of the volume oramount of aerosol to be generated for each of the respective aerosoldelivery devices 10, 10′ upon inhalation by a user. In this example,each of the controllers of the delivery devices 10, 10′ are providedwith source identification information which identifies the sourceliquid (more generally, the aerosol precursor material) contained in therespective aerosol delivery devices 10, 10′. For example, the firstaerosol delivery device 10 may have a source liquid having an appleflavoring while the second aerosol delivery device 10′ may have a sourceliquid having a strawberry flavoring. The source identificationinformation can be programmed into the control unit 20, 20′ of therespective delivery devices 10, 10′ by a user prior to using the aerosoldelivery devices 10, 10′ e.g., through connecting to a computer or thelike via a USB cable or, alternatively, each cartomizer 30, 30′ isprovided with an electronically readable chip or the like storing thesource identification information and, when the cartomizers 30, 30′ arecoupled to their respective control units 20, 20′, the chip is read bythe controller to obtain the source identification information.

An optimal mixture of the flavors in the example given may be in theratio of 2:1, for instance, as determined by the manufacturer of thecartomizers 30, 30′ or as set by a user based upon their preferences.When the first and second aerosol delivery devices 10, 10′ are firstcoupled, the source identification information is exchanged between thetwo devices using the electrical connection. Therefore, the firstaerosol delivery device 10 receives an indication that it is to be mixedwith a strawberry flavoring and, as a result, the controller controlsthe amount of power supplied to the heater 155 to generate a quantity ofapple-flavored aerosol that is suitably mixed with thestrawberry-flavored aerosol. This can be implemented based upon alook-up table referencing all produced flavors from the manufacturer andcombinations thereof. Equally, the second aerosol delivery device 10′receives source identification information from the first aerosoldelivery device 10′ and correspondingly controls the heater 155′ togenerate a suitable quantity of strawberry-flavored aerosol in a similarmanner. It should be appreciated that, in some implementations, thequantity of aerosol generated in respective aerosol delivery devices isalso a function of the air flow flowing through the aerosol deliverydevice as detected, for example, using a suitable sensor. In theseimplementations, aerosol is generated in each device as a function ofboth the flavor ratio and the detected air flow such that, regardless ofthe strength of the air flow, the flavor ratio is maintained.

It should be appreciated that the above describes a situation wherebythe volume of aerosol (and hence the ratio of flavors) is setautomatically based upon the detected flavors to be combined andinhaled. In alternative implementations, a user may have direct controlover the quantity of aerosol produced. As described above, a suitablesensor, such as a puff sensor is used to activate the heater 155, 155′when a puff is detected. To adjust the flavor ratio, the user may, forexample, press on one or more buttons located on the upper surfaces 222and 222′ of the respective control units 20, 20′ (not shown in thefigures). Such buttons may allow dynamic changing of the ratio offlavors prior to or during inhalation (e.g., by increasing or decreasingthe quantity produced by each individual aerosol delivery device 10,10′). In some implementations, pressing a button on the first aerosoldelivery device 10 may impact upon the aerosol generated by the secondaerosol delivery device 10′. In this case, the control signals mayinclude indications of button presses made on one of the aerosoldelivery devices.

In other implementations, the user may perform some action that affectsthe air flow through one of the aerosol delivery devices when thedevices are coupled. For example, the user may puff on only one of themouthpiece ends (or more strongly on one end) or may block the openingsof one mouthpiece end of the aerosol delivery device. The output fromboth puff sensors in these cases would be different and the differencecan be attributed to certain control functions of the aerosol deliverydevice. For example, the aerosol delivery device having the largerairflow value as detected by the puff sensors may be controlled toincrease the proportion of aerosol it generates in the mixture byincreasing the relative power supplied to the heater, for example whiledecreasing the relative power supplied to the heater of the otheraerosol delivery device. That is, if one aerosol delivery device isinstructed to increase the volume of aerosol output (thus making themixture more apple-based), the output of the other aerosol deliverydevice is decreased. A user can set the desired ratio based uponinteracting with one or the other of the devices. The total volume ofaerosol inhaled will depend upon the strength of the puff but the volumeof each flavor inhaled is set relative to the total volume based uponthe flavor ratio.

In other implementations, the control signals include communicationsbetween the controllers of the first and second aerosol delivery devices10, 10′, where said communications are used to establish a mastercontroller responsible for controlling the functions of both the firstand second aerosol delivery devices 10, 10′. Using a master controllermay help reduce energy/power consumption because other controllers canbe placed in a stand-by/lower-power mode. In addition, other components,e.g., flow/puff sensors, may also be placed in a low-power mode.

In this regard, when first coupled, the controllers are arranged to senddevice information (which may include the source identificationinformation in addition to other parameters such as current batterycharge, software/hardware version, usage statistics, etc.) to the othercontroller of the other aerosol delivery device. The controllers areprogrammed to determine, from the available controllers, a singlecontroller (master controller) by comparing the received deviceinformation to their own device information. Each controller thendetermines whether or not it should be a master controller. If it isdecided that a first controller should not be a master (e.g., becausethe battery charge is low compared to other devices, or the controlleris not compatible with the other controller(s), or for some otherreason) then no further action is taken.

Conversely, if the first controller determines that it should be amaster controller, it transmits a signal (via the electrical connection)indicating its eligibility to the remaining controllers. If theremaining controllers do not consider themselves master controllercandidates then the remaining controllers send an acknowledgement (ACK)signal back to the controller. If the total number of ACK signals isequal to the total number of sets of device information received, thecontroller then appoints itself master controller and assumesresponsibility for each of the controllers (and hence the functions ofeach of the aerosol delivery devices 10, 10′). Conversely, if one of theremaining controllers determines that it is a candidate mastercontroller, it transmits a negative acknowledgement (NACK) signal backto the first controller. On receiving the NACK signal the firstcontroller does not become a master controller, and the controllersending the NACK signal remains a master controller candidate. Theprocess can be cycled through until a master controller is selected oruntil the process is timed-out in which case a master controller may beselected at random from the candidate set.

It should be appreciated that the above is merely an example of how themaster controller can be selected from a number of controllers. Theexact process of how a master controller is selected is not particularlysignificant for the principles of the present disclosure, but ratherthat communications can occur between controllers of different aerosoldelivery devices 10, 10′ using the electrical connection. However, oneskilled in the art will be aware of other processes which may be used inconjunction with or in place of the above described selection processfor selecting the master controller.

In addition to control signals, the electrical contacts 228 and 228′also allow for power to be exchanged/transferred between aerosoldelivery devices 10, 10′. In other words, electrical power from thebattery or cell 210 of the first aerosol delivery device 10 can betransferred to the battery or cell 210′ of the second aerosol deliverydevice 10′ or directly to the heater 155′ of the cartomizer 30′ of thesecond aerosol delivery device 10′.

For example, electrical power can be shared between the first and secondaerosol delivery devices 10, 10′ to provide the respective batteries210, 210′ with the same level of charge. In other words, power can besupplied from the battery having the greatest charge to the batteryhaving the lowest charge in order to charge the battery having thelowest charge. Power can be transferred from one battery to anotheruntil each of the batteries has equal or approximately equal charge sothat, if decoupled, both aerosol delivery devices may be individuallyused to generate aerosol. In other implementations, the charge isdistributed in proportion to the output ratio of aerosol; for instance,using the example above, power is distributed in a 2:1 ratio betweenfirst and second aerosol delivery devices 10, 10′.

In one implementation, the control units 20 and 20′ are provided withappropriate circuitry configured to distribute power between thebatteries in a passive manner—that is, as soon as the electricalconnection is made using the contacts 228 and 228′, power is transferreduntil the batteries reach an appropriate level of charge. Alternatively,the control units 20 and 20′ are provided with circuitry configured totransfer power in response to certain actions. These certain actions mayinclude, for example, a user pressing on a button provided on the uppersurface 222 and/or 222′ of the control unit 20 and/or 20′ or in responseto a detected puff/inhalation as detected by a suitable sensor.

In yet another alternative implementation, power is not supplied to thebatteries 210 and 210′ but is instead supplied directly to the heater155 and/or 155′ in response to a detected puff. For example, thecontrollers may determine which of the batteries has the greatest charge(based upon transmitting device information between the aerosol deliverydevices 10, 10′) and use the determined battery to supply power to boththe heater 155 and heater 155′ via the electrical connection. In thisway, the battery having the greatest charge at any one time canpreferentially be used to generate aerosol in both of the aerosoldelivery devices 10, 10′. When the difference in charge reaches zero, orreverses (i.e., the battery supplying the power to both heater 155 andheater 155′ becomes the battery with the lowest charge), then thebattery responsible for supplying the power to both devices is switchedand the other battery is used in its place. In this way, when thedifference in charge between the batteries is small, the batteries arealternated between, meaning that at any one time the batteries haveapproximately the same level of charge. This provides similar benefitsas described above.

In yet further implementations, each of the control units 20, 20′comprises a dedicated USB (or similar) charging port as described above.When coupled, a user may connect a USB power cable (i.e., a USB cableconfigured to supply power from a power source such as mainselectricity) to either one of the USB charging ports. When a USB powercable is connected to a USB port, the electrical power supplied isdistributed to the respective batteries 210, 210′ using the electricalcontacts 228, 228′ so that both batteries may be charged using a singlepower cable and single port. For example, if a user connects the USBpower cable to the control unit 20, the control unit 20 (or mastercontroller) is configured to distribute some or all of the receivedpower to the battery 210′ of the control unit 20′ via the electricalcontacts 228 and 228′. The power may be transferred in accordance withany pre-set conditions. For example, the power may be distributed sothat each battery receives half of the input power (i.e., 50% of thepower is directed to battery 210 and 50% to battery 210′).Alternatively, the ratio of power distribution may be selected basedupon the current level of charge of the batteries 210, 210′ with thebattery having the lower charge being distributed a larger proportion ofthe incoming power. In other implementations, the power is firstdistributed to the battery of the control unit coupled to the powercable, e.g., battery 210, to charge that battery to a certain level(e.g., fully charged) before being distributed to the battery of thecontrol unit not coupled to the power cable, e.g., battery 210′. In thisway, a user can sufficiently charge both (or multiple) aerosol deliverydevices with only a single power cable and a single connection of thecable to the aerosol delivery system. This provides the user with a muchsimpler charging mechanism as the user only has to be concerned withconnecting the cable to any of the charging ports.

An aerosol delivery system 100 in which two aerosol delivery devices 10,10′ are magnetically and electrically coupled together via respectiveengagement mechanisms co-engaging has been described above. In thedescribed implementation, magnetic portions 226, 226′ and electricalcontacts 228, 228′ are provided on one surface of the respective aerosoldelivery devices. However, in other implementations, secondary (orfurther) magnetic portions and electrical contacts are disposed on othersurfaces of the aerosol delivery devices. For example, the engagementmechanism of each aerosol delivery device is provided with two groups ofmagnetic portions and electrical contacts (disposed on the uppersurfaces 222, 222′ and the lower surfaces 224, 224′). In thisimplementation, each of the magnetic portions on the upper surfaces 222,222′ have their poles aligned in the same first direction, while each ofthe magnetic portions on the lower surfaces 224, 224′ have theirmagnetic poles aligned in a second, opposite direction. Accordingly,such an arrangement facilitates the magnetic coupling of the upper andlower surfaces of respective aerosol delivery devices. Thus, unlike thedescribed implementation above, if magnetic coupling is not permittedbetween two surfaces (because the magnetic portions 226, 226′ repel eachother), then in this implementation a user can rotate one aerosoldelivery device by 180° about the longitudinal axis LA to provide amagnetic attraction between the secondary magnetic portions. Equally,the same can be said for the electrical contacts.

Moreover, in a further implementation, the engagement mechanisms (i.e.,the magnetic portions) and the electrical contacts are disposed on thesurfaces corresponding to the non-parallel sides of the generallytrapezoidal cross-section of the aerosol delivery device in FIG. 4(i.e., the sides connecting the upper and lower surfaces 222, 222′ and224, 224′). This arrangement can facilitate the magnetic coupling ofmany aerosol delivery devices in a ring-type arrangement by disposingaerosol delivery devices such that their non-parallel surfaces abut.

Although the magnetic portions 226, 226′ of the engagement mechanismsand electrical contacts 228, 228′ have been described as being providedon/in on/in surfaces of the control unit 20, 20′, it should beunderstood that the engagement mechanisms (magnetic portions 226, 226′)and/or electrical contacts 228, 228′ may additionally or alternativelybe provided on surfaces of the cartomizers 30, 30′.

Furthermore, in alternative implementations, the engagement mechanism ofthe second aerosol delivery device 10′ comprises the housing of thecontrol unit 20′ or cartomizer 30′. In this implementation, the secondaerosol delivery device is made of a magnetic material—that is, thehousing of the control unit 20′ is formed from a material that ismagnetically attracted to the engagement mechanism of the first aerosoldelivery device 10 (e.g., magnetic portions 226). Precise aligning ofthe magnetic portions 226 and 226′ is therefore not required in thisimplementation and it is irrelevant whether or not magnetic portions onopposing devices are aligned in a manner to provide attractive magneticcoupling therebetween as in FIG. 5A. Instead, magnetic coupling occursbetween the magnetic portions 226 and an area of the control unit 20′.Although in this implementation it is not required that both aerosoldelivery devices 10, 10′ are provided with the magnetic portions 226,226′, in other implementations both aerosol delivery devices 10, 10′ areprovided with their engagement mechanisms comprising both the magneticportions 226 or 226′ and the housing of the respective cartomizer 30,30′ and/or and/or control unit 20, 20′. This can enable a stackedarrangement of aerosol delivery devices for example where couplingbetween two delivery devices of the stack is achieved by the magneticportions of one aerosol delivery device coupling to the housing of theother delivery device as described above. It should be noted that thereservoirs 160, 160′ may be constructed to contain any amount of aerosolprecursor depending upon the application at hand. However, in oneimplementation, the total volume of liquid aerosol precursor materialcontained in each reservoir is set to, e.g., 2 ml divided by the numberof aerosol delivery devices intended to be coupled together. Thus, foran aerosol delivery system consisting of two aerosol delivery devices,each reservoir is constructed to contain a maximum of 1 ml of liquidaerosol precursor. In this way, the total volume of liquid aerosolprecursor material does not exceed 2 ml in normal use when theindividual aerosol delivery devices are coupled.

Described above is an aerosol delivery system 100 comprising two aerosoldelivery devices 10 and 10′ that are magnetically coupled together.However, the principles of the present disclosure can be applied toaerosol delivery devices that comprise mechanical engagement mechanismsproviding co-engagement of the aerosol delivery devices. That is, theaerosol delivery devices are selectively coupled together mechanicallythrough the engagement mechanisms rather than magnetically.

FIGS. 6A and 6B schematically show two aerosol delivery devices 610 and610′ as viewed along a direction offset from the longitudinal axesthereof according to a second implementation of the present disclosurethat, when coupled together, form a mechanically interlocked/coupledaerosol delivery system 600.

Specifically, FIG. 6A shows a first aerosol delivery device 610 and asecond aerosol delivery device 610′ in a decoupled state. The first andsecond aerosol delivery devices 610, 610′ comprise respectivecartomizers 630 and 630′ and control units 620 and 620′. In FIG. 6A, thesecond control unit 620′ is shown decoupled from the second cartomizer630′ and, as such, connectors 625A′ and 625B′ are exposed, while thefirst control unit 610 is shown coupled to the first cartomizer 630 viaconnectors (not shown).

The internal construction of the control units 620, 620′ and thecartomizers 630, 630′ is not shown in FIGS. 6A and 6B; rather, only theouter surfaces of the aerosol delivery devices 610, 610′ are shown.However, the first and second aerosol delivery devices 610 and 610′comprise the necessary internal components required to function as anaerosol delivery device, e.g., components similar to those shown inFIGS. 2 and 3 with respect to the cartomizer 30 and control unit 20. Theskilled person would readily employ the necessary components as requiredin view of the implementation described above and in accordance withconventional approaches.

The aerosol delivery devices 610, 610′ in the second implementationgenerally have a hemi-cylindrical shape; that is, the cross-section ateither end of the aerosol delivery devices 10, 10′ is semi-circular.However, instead of the control units 620, 620′ having magnetic portionsto provide magnetic coupling as in the first implementation of FIGS. 1and 5A to 5C, the aerosol delivery devices 610, 610′ (specifically asection of the cartomizers 630, 630′ thereof) are provided withinterlocking sections 631, 631′. The interlocking sections constitutethe respective engagement mechanisms of this implementation.

Each interlocking section 631, 631′ is defined, in this implementation,from the end of the mouthpiece end 635, 635′ joined to the interlockingsection 631, 631′ to the opposite end of the cartomizer 630, 630′. Theinterlocking section 631, 631′ is formed from a transparent material toenable a user to see inside the cartomizer 630, 630′. The interlockingsection 631, 631′ is a hollow structure and includes a reservoir foreach aerosol delivery device in this implementation in which the aerosolprecursor material/liquid formulation is stored. Owing to thetransparent construction, a user can visually detect when the aerosolprecursor is running low or requires replacement. However, the aerosoldelivery devices 610, 610′ may generally be formed from any suitablematerials, e.g., opaque plastic, metal, etc.

As can be seen in FIG. 6A, the interlocking sections 631, 631′ areconstructed in a manner such that the hemi-cylindrical shapeprogressively rotates about the longitudinal axis LA when moving alongthe respective longitudinal axes LA, LA′ by a constant amount. That is,for the first aerosol delivery device 610, as one passes from themouthpiece end 635 towards the opposite end of the cartomizer 630, thehemi-cylindrical shape rotates, e.g., clockwise, about the longitudinalaxis LA by a total of approximately 270°. By way of example only, thehemi-cylindrical shape may be rotated clockwise by a constant amount of54° per cm, thus meaning the interlocking section is approximately 5 cmin length (along the longitudinal axis). Similarly, the cartomizer 630′of the second aerosol delivery device 610′ has a hemi-cylindrical shapethat rotates at the same pitch as cartomizer 630 along the longitudinalaxis LA′ in the interlocking section 631′. In both interlocking sections631, 631′ shown in FIG. 6A, it should be appreciated that thesemi-circular cross-section at the start of the interlocking section(i.e., the ends directly after the mouthpiece ends 635, 635′) is offsetrelative to the semi-circular cross-section at the opposite end by 270°or 90° depending upon the definition of the direction of rotation aboutthe longitudinal axis.

It should be appreciated, however, that in other implementations theextent to which the hemi-cylindrical cross-sectional shape is rotatedalong the longitudinal axis of the cartomizer 630, 630′ may be more orless than that described above. For example, in one implementation, thehemi-cylindrical shape is rotated by a total of 90° about thelongitudinal axis LA, LA′ when moving from one end of the interlockingsection along the longitudinal axis to the other end. That is, in thisexample, the hemi-cylindrical shape is rotated at a constant amount of18° per cm over a length of 5 cm. In addition, in other implementations,the degree of rotation is not constant along the length of theinterlocking section—for example, the rotation amount may vary along thelength of the longitudinal axis LA, LA′. However, in the case of avarying rotation amount, the interlocking sections 631, 631′ should beprovided with the same or a similar degree/magnitude of variation ateach position along the longitudinal axis.

This construction of the interlocking sections 631, 631′ enables a userto couple together the aerosol delivery devices 610, 610′ using amechanical coupling. FIG. 6B schematically shows the aerosol deliverysystem 600 in a (releasably) coupled state whereby the user hasperformed a certain action to enable the aerosol delivery devices 610,610′ to mechanically couple.

In this implementation, the specific action involves aligning theinterlocking sections 631, 631′ of the respective aerosol deliverydevices 610, 610′ and twisting/pressing the interlocking sections 631,631′ together such that the flat surfaces of the hemi-cylindrical shapesof both aerosol delivery devices 610, 610′ abut. FIG. 6B schematicallyshows the aerosol delivery system 600 in a (mechanically) coupled state,whereby the first and second aerosol delivery devices 610, 610′ of FIG.6A have been manipulated such that the interlocking portions 631, 631′interlock. As can be seen in FIG. 6B, when the separate aerosol deliverydevices 610, 610′ are interlocked, they define a cylindrical shape(composed of the respective hemi-cylindrical shapes) and share a commonlongitudinal axis. When coupled, the hemi-cylindrical shapes of theinterlocking sections 631, 631′ of this implementation are rotated inthe same direction along the common longitudinal axis (e.g., clockwise)but the starting positions are offset from one another by 180°.Moreover, the interlocking sections 631, 631′ enable the mouthpiece ends635, 635′ of the respective aerosol delivery devices 610, 610′ to beprovided adjacent one another when the devices 610, 610′ are coupled.

The construction of the interlocking sections 631, 631′ enables theinterlocking sections (and thus the cartomizers 630, 630′ and attachedcontrol units 620, 620′) to be mechanically coupled together and held ina way such that only a specific set of actions will separate/uncouplethe interlocking sections 630, 631′. Therefore, the interlockingsections 631, 631′ prevent or substantially preventsliding/twisting/slipping of one aerosol delivery device relative toanother during normal use (i.e., when inhaling on the devices), butenable quick and intuitive separation of the aerosol delivery devices610, 610′ under application of the appropriate force/movement.

Although not shown, the interlocking sections 631, 631′ are formed witha dividing wall running along the length of the respective interlockingsections to define two compartments within the hollow interior of theinterlocking sections. In cross-section, the dividing wall divides thecross-section of the interlocking portions. The two compartments arefluidly isolated within the interlocking section. One of thecompartments forms the reservoir and contains the aerosol precursor(e.g., the fluid to be vaporized). The other compartment forms an airpassage, e.g., similar to air passage 161, to allow air to be passedfrom the control unit 620, 620′ to the mouthpiece end 635, 635′.

In some implementations, the dividing wall is semi-circular in shapeand, when viewed in cross-section, splits the semi-circular shape of theinterlocking section into a first compartment having a semi-circularshape with a smaller radius than the overall semi-circular shape of theinterlocking section, and a second compartment having an annularcross-section with a radius greater than the first compartment. In otherwords, the second compartment is formed to surround the outer curvededge of the first compartment, although it should be appreciated thatthe compartments can be formed to have other cross-sectional shapes. Inthis implementation, the dividing wall is twisted in accordance with therotation of the respective interlocking section.

In the releasably coupled state, as with the aerosol delivery system100, the mouthpiece ends 635, 635′ of the respective aerosol deliverydevices 610, 610′ are adjacent one another. Equally, the respectivelongitudinal axes LA, LA′ of the first and second aerosol deliverydevices 610, 610′ are provided parallel to one another. In much the sameway as described for system 100, a user can place their lips around therespective mouthpiece ends 635, 635′ to engage both mouthpiece endssimultaneously. When a user inhales on the mouthpiece ends 635, 635′,air passes along the air passage (second compartment) of the respectiveinterlocking sections (either prior to or after being mixed with thegenerated aerosol for the respective aerosol delivery devices 610, 610′depending upon the location of the heater) and into the mouthpiece end635, 635′. As a result, a user inhaling on the mouthpiece ends 635, 635′can be provided with a mixture of aerosols generated by both the firstand second aerosol delivery devices 610, 610′. It should be readilyunderstood that, as with the aerosol system 100 described above, theaerosol system 600 permits users to intuitively and easily switch liquidformulations (e.g., flavors) without disassembling and reassembling theaerosol delivery devices 610, 610′. Additionally, each of the aerosoldelivery devices 610, 610′ is able to function independently in thedecoupled state; that is, a user may inhale aerosol generated by device610 when not coupled to device 610′.

It should be understood that interlocking section 631 is able to bemechanically interlocked with interlocking section 631′ because therotation of the hemi-cylindrical shapes are in the same directions aboutthe longitudinal axes. Interlocking section 631 would not be able tointerlock with another interlocking section having the same shape butrotated in the opposite direction about its longitudinal axis (e.g.,anticlockwise by a constant amount of 54° per cm) in thisimplementation. Therefore, in much the same way as with the magneticportions 226 and 226′, certain interlocking sections (and thuscartomizers/control units) cannot be combined. This may also be the casewhere the rotation about the longitudinal axis is in the same directionbut the variation in rotation degree along the longitudinal axes of therespective interlocking sections is different. This may be useful inpreventing certain flavors flavours or nicotine strengths, for example,from being combined as these liquid formulations can be stored inmutually exclusive interlocking sections.

Although not shown in FIGS. 6A and 6B, the aerosol delivery devices 610,610′ may also be provided with electrical contacts, similar toelectrical contacts 228, 228′ to permit control signals or power to betransferred between coupled aerosol delivery devices 610, 610′. Forexample, the electrical contacts may be disposed on the flat (i.e.,non-curved) surface of the hemi-cylindrical control units 620, 620′.Hence, when performing the interlocking motion, the electrical contactsare bought into contact to electrically couple the two aerosol deliverydevices 610, 610′. The transfer of power and/or control signals may becarried out as described above.

The interlocking sections 631, 631′ described above are merely given asan example and it will be appreciated by the skilled person that theinterlocking sections 631 and 631′ can take other shapes to provide amutually interlocking function. For instance, the degree of rotation ofthe hemi-cylindrical shape may be more or less than described, or thegeneral cross-section may be square or, more generally, polygonal in theinterlocking sections as opposed to hemi-cylindrical. Equally, althoughthe interlocking portions 631, 631′ are shown as being formed in thecartomizers 630, 630′, it should be understood that the control units620, 620′ may alternatively or additionally comprise the interlockingsections.

The above described second implementation makes use of the shape of theinterlocking sections/cartomizers to provide a mechanical coupling. Theengagement mechanisms by which the mechanical coupling occurs aretherefore integrally formed with the aerosol delivery devices. In otherimplementations, the mechanical coupling of two or more aerosol deliverydevices is achieved in other ways using an integrally formed mechanicalcoupling.

For example, although not shown, the aerosol delivery devices mayintegrally comprise one or more clips positioned on an outer surfacethereof and configured to receive a portion of the other aerosoldelivery device. The engagement mechanism of the first aerosol deliverydevice in this implementation is the one or more clips integrally formedwith the outer surface thereof, while the engagement mechanism of thesecond aerosol delivery device is a section or part of the outer surfaceof the second aerosol delivery device that can be received by the one ormore clips. For example, for a second aerosol delivery device having acircular or approximately circular cross-section, the clip is providedin a C-shape whereby the body of the second aerosol delivery device canbe pressed into the inner part of the C-shape clip through theseparation between the ends of the C. In this implementation, theC-shape clip is resiliently deformable and has an internaldiameter/dimension slightly less (e.g. less than 10%, or less than 5%)than the diameter/dimension of the opposing aerosol delivery device.Accordingly, the resiliently deformable C-shape clip applies a radiallycompressive force on the opposing aerosol delivery device when locatedin the internal region of the C-shaped clip. Here, radially compressiveforce means a force acting towards the central point of the internalregion of the C-shaped clip along a diameter thereof. Therefore, in thisimplementation, the two aerosol delivery devices can be mechanicallycoupled to provide a non-slipping/sliding arrangement during normal use.It should be apparent that the aerosol delivery devices can be coupledsuch that the mouthpiece ends thereof generally align as describedabove.

In alternative implementations, one aerosol delivery device may beprovided with an integrally formed protrusion as the first engagementmechanism on an outer surface thereof which is shaped in a manner to bemechanically received (and held) in a correspondingly shaped recessprovided on an outer surface of the other aerosol delivery device as thesecond engagement mechanism. Accordingly, by inserting the protrusioninto the recess, and optionally sliding/rotating/pressing the protrusioninto the recess (which may define a track along which the protrusion isguided during coupling), the two aerosol delivery devices can bemechanically coupled and held together during normal use. The protrusionand recess may take any corresponding shape that enables the two devicesto be releasably locked together, e.g., corresponding T-shapes whenviewed in cross-section. Such mechanical coupling mechanisms aregenerally known in the art and any suitable mechanism may be used inaccordance with the principles of the present disclosure.

Additionally, the principles of the present disclosure do not require aspecific mechanical coupling mechanism to be used. Any availablemechanism that would be suitable may be used.

It has been described above that system 100 comprises aerosol deliverydevices having a generally cuboidal shape, while system 600 comprisesaerosol delivery devices have a generally hemi-cylindrical shape 600.However, the principles of the present disclosure are not limited toaerosol delivery devices having the described shapes and aerosoldelivery devices having any shape can be used, provided that couplingbetween surfaces thereof is permitted. Additionally, the aerosoldelivery devices 10, 10′ 610, 610′ have been described generally asbeing a two-piece construction comprising separate but connectablecartomizers 30, 30′, 630, 630′ and control units 20, 20′, 620, 620′.However, the principles of the present disclosure apply to aerosoldelivery devices being formed of more or less than two main constituentcomponents. For example, the disclosure applies to aerosol deliverydevices having a single-piece (i.e., integrated) construction.

It has also generally been disclosed above that aerosols generated byeach of the aerosol delivery devices are mixed and inhaled. That is, theair that the user inhales comprises a mixture of the different aerosolsthat is mixed upon exiting the mouthpiece end. However, in otherimplementations, the two aerosols may be substantially kept separateduring inhalation by the user. In these implementations, the differentgenerated aerosols are directed to different areas of the mouth usingmouthpiece ends 35, 35′ that impart directionality to the individualaerosols as described above. When the aerosol delivery devices arecoupled, the different aerosols are directed along different directions.For example, the aerosol generated by a first device may be generallydirected along a first direction angled with respect to the longitudinalaxis LA, LA′ while aerosol generated by a second device may be generallydirected along a second direction angled with respect to thelongitudinal axis but different from the first direction. Although theareas of the mouth that the aerosol is directed to will depend upon theorientation of the coupled aerosol delivery devices, one could imaginethe different aerosols being separately directed to the left and rightsides of the mouth cavity.

Thus, there has been described an aerosol delivery system including: afirst engagement mechanism, a first power supply, and a first vaporizer,wherein the first vaporizer is arranged to selectively receive powerfrom the first power supply to generate a first aerosol from a firstaerosol precursor material for user inhalation; and a second aerosoldelivery device comprising a second engagement mechanism, a second powersupply, and a second vaporizer, wherein the second vaporizer is arrangedto selectively receive power from the second power supply to generate asecond aerosol from a second aerosol precursor material for userinhalation; wherein the first engagement mechanism of the first aerosoldelivery device and the second engagement mechanism of the secondaerosol delivery device are arranged to releasably co-engage with oneanother to selectively couple the first aerosol delivery device to thesecond aerosol delivery device so the first aerosol delivery device andthe second aerosol delivery device may be used together to deliver thefirst and second aerosols to a single user when they are coupledtogether and may be used independently to deliver the first and secondaerosols to different users when they are not coupled together.

While the above described embodiments have in some respects focused onsome specific example aerosol delivery systems, it will be appreciatedthe same principles can be applied for aerosol delivery systems usingother technologies. That is to say, the specific manner in which variousaspects of the aerosol delivery system function are not directlyrelevant to the principles underlying the examples described herein.

In order to address various issues and advance the art, this disclosureshows by way of illustration various embodiments in which the claimedinvention(s) may be practiced. The advantages and features of thedisclosure are of a representative sample of embodiments only, and arenot exhaustive and/or exclusive. They are presented only to assist inunderstanding and to teach the claimed invention(s). It is to beunderstood that advantages, embodiments, examples, functions, features,structures, and/or other aspects of the disclosure are not to beconsidered limitations on the disclosure as defined by the claims orlimitations on equivalents to the claims, and that other embodiments maybe utilized and modifications may be made without departing from thescope of the claims. Various embodiments may suitably comprise, consistof, or consist essentially of, various combinations of the disclosedelements, components, features, parts, steps, means, etc. other thanthose specifically described herein, and it will thus be appreciatedthat features of the dependent claims may be combined with features ofthe independent claims in combinations other than those explicitly setout in the claims. The disclosure may include other inventions notpresently claimed, but which may be claimed in future.

1. An aerosol delivery system comprising: a first aerosol deliverydevice comprising a first engagement mechanism, a first power supply,and a first vaporizer, wherein the first vaporizer is arranged toselectively receive power from the first power supply to generate afirst aerosol from a first aerosol precursor material for userinhalation; and a second aerosol delivery device comprising a secondengagement mechanism, a second power supply, and a second vaporizer,wherein the second vaporizer is arranged to selectively receive powerfrom the second power supply to generate a second aerosol from a secondaerosol precursor material for user inhalation; wherein the firstengagement mechanism of the first aerosol delivery device and the secondengagement mechanism of the second aerosol delivery device are arrangedto releasably co-engage with one another to selectively couple the firstaerosol delivery device to the second aerosol delivery device so thefirst aerosol delivery device and the second aerosol delivery device maybe used together to deliver the first aerosol and the second aerosol toa single user when the first aerosol delivery device and the secondaerosol delivery device are coupled together and may be usedindependently to deliver the first aerosol and the second aerosol todifferent users when the first aerosol delivery device and the secondaerosol delivery device are not coupled together.
 2. The aerosoldelivery system of claim 1, wherein the first aerosol delivery devicecomprises a first mouthpiece opening through which the first aerosol isdelivered to a user during use and the second aerosol delivery devicecomprises a second mouthpiece opening through which the second aerosolis delivered to a user during use, wherein the first mouthpiece openingand the second mouthpiece opening are arranged adjacent when the firstaerosol delivery device and the second aerosol delivery device arecoupled together.
 3. The aerosol delivery system of claim 1, wherein thefirst aerosol delivery device and the second aerosol delivery device areelongate and extend along respective longitudinal axes which areparallel to one another when the first aerosol delivery device and thesecond aerosol delivery device are coupled together.
 4. The aerosoldelivery system of claim 1, wherein the first engagement mechanism andthe second engagement mechanism comprise one or more magnets arranged toselectively magnetically couple the first aerosol delivery device to thesecond aerosol delivery device.
 5. The aerosol delivery system of claim1, wherein the first engagement mechanism and the second engagementmechanism comprise mechanically interlocking elements arranged toselectively mechanically couple the first aerosol delivery device to thesecond aerosol delivery device.
 6. The aerosol delivery system claim 1,wherein the first engagement mechanism comprises a portion of the firstaerosol delivery device having a first shape, and the second engagementmechanism comprises a portion of the second aerosol delivery devicehaving a second shape, wherein the first shape is arranged tocooperatively engage with the second shape to selectively couple thefirst aerosol delivery device to the second aerosol delivery device. 7.The aerosol delivery system of claim 6, wherein the first shape and thesecond shape comprise interlocking spiral portions of the respectivefirst aerosol delivery device and the second aerosol delivery device. 8.The aerosol delivery system of claim 6, wherein the first shape and thesecond shape are arranged so that the first aerosol delivery device isselectively mechanically coupled to the second aerosol delivery deviceby bringing the first aerosol delivery device and the second aerosoldelivery device into contact with the respective axes of extentperpendicular to one another, and then rotating one of the first aerosoldelivery device or the second aerosol delivery device relative to theother so the respective axes of extent become parallel to one anotherwhile also rotating at least one of the first aerosol delivery device orthe second aerosol delivery device about the respective axis of extent.9. The aerosol delivery system of claim 1, wherein the first engagementmechanism comprises a resilient clip and the second engagement mechanismcomprises a portion of the second aerosol delivery device arranged to beengaged by the resilient clip to selectively couple the first aerosoldelivery device to the second aerosol delivery device.
 10. The aerosoldelivery system claim 1, wherein the first engagement mechanismcomprises a protrusion from the first aerosol delivery device and thesecond engagement mechanism comprises a recess in the second aerosoldelivery device, wherein the recess in the second aerosol deliverydevice is arranged to receive the protrusion from the first aerosoldelivery device to selectively couple the first aerosol delivery deviceto the second aerosol delivery device.
 11. The aerosol delivery systemof claim 1, wherein the first aerosol delivery device comprises a firstelectrical interface and the second aerosol delivery device comprises asecond electrical interface, wherein the respective first electricalinterface and the second electrical interface are arranged to provide anelectrical connection between the first aerosol delivery device and thesecond aerosol delivery device when the first aerosol delivery deviceand the second aerosol delivery device are coupled together.
 12. Theaerosol delivery system of claim 11, wherein the first aerosol deliverydevice comprises a first control unit configured to control operation ofthe first aerosol delivery device, and the second aerosol deliverydevice comprises a second control unit configured to control theoperation of the second aerosol delivery device, and wherein at leastone of the first control unit or the second control unit is configuredto control an aspect of operation of the other of the first aerosoldelivery device or the second aerosol delivery device by controlsignaling exchanged via the electrical connection between the firstaerosol delivery device and the second aerosol delivery device when thefirst aerosol delivery device and the second aerosol delivery device arecoupled together.
 13. The aerosol delivery system of claim 12, whereinthe aspect of the operation of the other of the first aerosol deliverydevice or the second aerosol delivery device comprises an amount ofpower supplied to the vaporizer of the other of the first aerosoldelivery device or the second aerosol delivery device.
 14. The aerosoldelivery system of claim 11, wherein, when the first aerosol deliverydevice and the second aerosol delivery device are coupled together, atleast one of: the first vaporizer is further arranged to selectivelyreceive power from the second power supply via the electrical connectionbetween the first aerosol delivery device and the second aerosoldelivery device, or the second vaporizer is further arranged toselectively receive power from the first power supply via the electricalconnection between the first aerosol delivery device and the secondaerosol delivery device.
 15. The aerosol delivery system of claim 14,wherein relative amounts of power supplied to one of the first vaporizeror the second vaporizer from the first power supply and the second powersupply is determined based on relative amounts of power remaining in thefirst power supply and the second power supply.
 16. An aerosol deliverydevice comprising: a power supply; a vaporizer arranged to selectivelyreceive power from the power supply to generate an aerosol from anaerosol precursor material for user inhalation; and an engagementmechanism for releasably co-engaging the aerosol delivery device with afurther aerosol delivery device arranged to generate a further aerosolfor user inhalation so the aerosol delivery device and the furtheraerosol delivery device may be used together to deliver aerosol to asingle user when the aerosol delivery device and the further aerosoldelivery device are coupled together and the aerosol delivery device maybe used independently of the further aerosol delivery device when theaerosol delivery device is not coupled to the further aerosol deliverydevice.
 17. An aerosol delivery system comprising: first aerosoldelivery means comprising first engagement means, first power supplymeans, and first vaporizing means, wherein the first vaporizing means isarranged to selectively receive power from the first power supply meansto generate a first aerosol from a first aerosol precursor material foruser inhalation; and second aerosol delivery means comprising secondengagement means, second power supply means, and second vaporizingmeans, wherein the second vaporizing means is arranged to selectivelyreceive power from the second power supply means to generate a secondaerosol from a second aerosol precursor material for user inhalation;wherein the first engagement means of the first aerosol delivery meansand the second engagement means of the second aerosol delivery means arearranged to releasably co-engage with one another to selectively couplethe first aerosol delivery means to the second aerosol delivery means sothe first aerosol delivery means and the second aerosol delivery meansmay be used together to deliver the first aerosol and the second aerosolto a single user when the first aerosol delivery means and the secondaerosol delivery means are coupled together and may be usedindependently to deliver the first aerosol and the second aerosol todifferent users when the first aerosol delivery means and the secondaerosol delivery means are not coupled together.